I just recently used interceptor to treat my reef because of redbugs that I noticed on some of sps. There is a ton of information on how to dose so do a search on that, but general rule is you do a total of 3 rounds of treatment.
As far as livestock goes, fish, corals, clams, starfish, should all be fine. It's the shrimp and crabs that may not survive the treatment. When I dosed I lost maybe half of hermit crabs, but my cleaner shrimp survived. I also only did two rounds of treatment instead of the three.